Electrical apparatus.



A. L. R. ELLIS.

ELECTRICAL APPARATUS.

1,232,253. APPLICATION FILED JULY 3, 1915. Patented 3,

2 SHEETS-SHEET I.

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A. L. R. ELLIS.

ELECTRICAL APPARATUS.

APPLICATION FILED JULY 8. 1915.

1 ,232,253. Patented July 3,1917.

2 SHEETS-SHEET 2.

s a I! MULTIPLE [KAI-BB B /7 A if Z Z2 Z0 12 24 wlbnesses: Inventor:

.fHvar-ado L .F?.El|is,

u l 7&5 W fiM i UNITED STATES PATENT OFFICE.

nnvnnano L. n. simmer-LYN MAssnoHUsn'r'rs; AssmNon, 'ro GENERAL nnno'rnre 1 cOnmmm-acQnFonnrroN on NEW YORK.

ELECTRICAL APPARATUS.

Specification of Le'tters latent z Application and Luly a, 1915, Serial flqQiBJTL I To all ot/tom it may concern;

Be' it-li'nown, that. I, ALvAn no L. REcnrs,

a citizen of the United States, residi ng. at

, ments haying two or more coils or windings adapted to be connected in series, or par allel, or .series-parallel for varying the effect.

or range, of. the apparatus zor instljument Electrical. measuring I instruments are fre-.

quentlyprovided/with two or more... .coils l a suitable scale 14; I

inductively related to a relatively movable element or coil for .the purpose of varying the, range .of the ,instrument by .connect1ng f the first-rnentioned coils in series or parallel. Thesecoilsnsually consistofa plnrality of conductor turns, and. for accurate. results. t

is essential that the magnetic eifeotsiof tlie conductorsof these coils :be .eqna lly dis:-

trihuted with respect to the relatively moyable element. The object otmyiinvention is to providea novel. and improved ar;

range nent of the-cond-uetorsof two or more. coils for .obtain ing equal a magnetic effects fron the coils. More particularly the .object of my invention is toproyidma novel and improved electrical measuring. instrnr. ment. having two ormore coils adapted for series or parallel connection induetiy ely re: lated to an. armature element in which. the. magnetic; effects of the coils; are equally distributed;

The novel. features,, wh icl1 I believe to. be, patentably characteristic of a my, invention are definitely indicated in .the claims ap.;. pendedher eto. The.principle of my inyen tion and its application to an electrical ,meas;

uringinstrument will be un der s to,od from r the following description, ,taken in connec tion with the accompanying dravgings in woven. together andwqund, as: a single. unit which;

Figure, 1 is a plain 'ie\v. 1.)ar.tly. in section of an electrical measuring instrtunent. em

the features of my... present. inven,--

i g tion; 1g. 2 is a side elevation.,of the.'s;witch.,,

and binding posts of the instrument; Fig. 3 is a plan view ;of .-the-,ins.trun1ent coils; Fig. 4 is a front elevation partly in section of theinstrumentcoils;Figs...,5 andtfi .are...-

detail views of the switch, Fig. 5 being'ia section on the line 5-5 of Fig. 6; Fig. 7

is a view of the braidedor woven conductor Patented-Julyfi, 1917;.

structure .em pyea, in the stati o"na ry 'coils of'thefin'str urnent; and Figs... 8 and 9 are diagrammatic VIQYYSL of. the two p perative connectioii s of the stationary coils.

The instrument jlhistrated in the accompanying drawings for- -the puliposef of. eX- plaining my inyention ,is an amineter com-i pr sing .a' pivota lly nounted armature. .10. inductiv'el ,'.relat [to two stationary coils 11 and 1 2 adapted to. ,be connected in seriesor per ral l eljl for yaryi ng..the capacity of the instr lnnen'tt A pointer. or indicating needle 13 sec ui eii. ,tolth e'i shaft oi the armature element lO'and. is adapted to sweep across achcstationar :coil 11 and 12 consists of a plurality o con; ductors or strain s .conne cted.j,in =multiple. All of th e co nduetorsor strandsof b th coils are intimatelydnixed; .or, interwoven by braiding the strands, as illustrated in Fig. 7 of the. drawingsl One of. the' strands is repjrsentd byja solid black line in Fig. 7 in. order toshow thegeneraleharacter of. the interwea ving'pr; i braiding. Itf ,will be obseryed by' reference to Fig. 3 0'1: t he dra\v-.

ings, that..each coil. 11 "and 12 consists of1sixstrands.; The twelve strandsof the .two

coils are braidedor interwoven in. any suit able' manperin ,order to thoroughly mix the strandsg so that the. magnetic efiect .of each strand of the two coils is equally distributed witlr-respeetto. armature The result is a fiatbmided structure in-which each strand r conductoristhre aded back and forth across theentire width. of thelnaided structure, as.;elear1y; shown in Fig. 7 Thus, V

instead of nsing for eaoh coil a single conduc'tor. of the required .current-carrying eapacityi I employ a plurality of conductors or strands and-intimately. distribnte. the

magneticefleetsof these strands by thoroughly mixing 'the stran ds together.

All of the condnctors, of the two ,coilsare upon a suitablesupport, asindicated in 1*igs....3 and 4: of the..draw1ngs...As.is .usual. in instrnnients. of this ;type, .the support .15

is desi so, that/the stationary winding or.

element is. composed,ofttwo sections a and];

symmetrically;positioned,.wi respecttothe armature. It will be noted t at the width of ,-the ..braided. ,eonduetQr-struetnre...is .the. same ast-that of the coil sections a and b. The stationary element of the instrument thus consists in effect of a plurality of con ductors intimately woven together and divided into two groups. The terminals of the two groups of conductors, that is to say the terminals of the two coils 11 and 12, are brou t out to binding posts AB and A'-%, =respectively.- The binding posts A and B extend without the instrument casing 16, and serve to connect the instrument into the electric circuit whose current flow 18 to strip 26 electrically connected to the binding A fourth contact brush 25 is ele'c trically connected to the binding post B by post A.

a contact strip 27, and is adapted to be electrically connected to the contact brush 23 by the contact 21 of the switch.

The switch drum is turned bya handle 28 extending outside the instrument casing. In

one operative position of the switch drum, the contact brushes 22 and 23 are electrically connected by the contact 20, and the coils 1.1 and 12 are connected in series, as diagrammatically indicated in F ig. 8 of the drawing's. In the other operative position of the drum, contact brushes 22 and 24: are electrically connected by the contact 20, while contact brushes 23 and 25 are electrically connected by the contact 21, and the coils 11 and 12 are connected in parallel, as diagrammatically illustrated in Fig. 9 of the drawings.

It will be evident from the foregoing description that in accordance with my present invention each strand of each of the two stationary coils is threaded back and forth across the entire coil width, so that the magnetic effects of the conductors of the coils are equally distributed with respect to the armature element. It will be understood that the magnetic effect upon the armature element of a conductor near the inside of a coil section is greater than that of a conductor at the outside of a coil section. My novel braided conductor structure carries every conductor or strand of each coil from the outside tothe inside of the coil width many times, and each conductor is thus well distributed over the entire coil width, so that the magnetic effect of each conductor'upon the armature element is subnections of the coils are varied to change the .range of. the-instrument, the magnetic effects of the conductors of the coils will be relatively-the. same, since every conductor of both coils is equally distributed over the coil width.

What I claim as new and desire to secure by Letters Patentof the United States, is,

1. An alternating current electrical measuring instrument comprising'a movable armature, two stationary coils inductively related to said armature, each of said coils comprising a plurality of conductors, all of the conductors of both coils being interwoven to equally distribute the magnetic effects of the conductors with respect to said armature, and means for connecting said coils series or in parallel. v

2. An alternating current electrical measiiringinstrument comprising a movable ar-' mature; a plurality of conductors woven toigeth ei' and wound as a substantially unitary element in'duc-tiyely related to said armature,

said conductoisbeing divided into a plurality'of groups to form in effect a plurality of individual coils, and means for connecting said groups of conductors in series or in parallel. I V

3. An alternating current electrical apparatus comprising'in combination two coils inductively related to a third element, each of said coils consisting of a plurality of conductors, all of the conductors of both coils being woven together and wound as a single unit so that the magnetic effects of the conductors are equally distributed with respect to said third element, and means for connecting said coils in series or in parallel.

4. An alternating current electrical measuring instrumentlcomprising a movable armature, a stationary element inductively related to said armature and consisting of a plurality of conductors intimately woven together and divided into a plurality of groups, and means for connecting said groups of conductors in series or in parallel.

5. An alternating current electrical apparatus including a winding consisting of a. plurality of conductors woven together and wound as a substantially unitary element, said conductors being divided into a plurality of groups to form in effect a. plurality of individual coils-and means for connect ing said groups of conductors in series or in parallel for varying the magnetic effect of said winding.

In witness whereof, I have hereunto set my hand this sixth day of July, 1915.

ALVARADO L. R. ELLIS.

Copies of thll patent may be obtained tor five cents each, by addressing the commissioner of Patents.

Washington, D. O." 

